- many tv/streaming devices are not designed for high bitrate 4k bluray remuxes
- most tvs have only 100mbit ethernet (which is not enough for some content)
- if dolby vision is involved, that is even more complicated
you may want to review the thread @ Plex, 4k, transcoding, and you for a lot of 4k background and info
also, to truly troubleshoot we need more info
